Secnil Forte Tablet is used to treat various infections caused by bacteria and parasites (amoeba). It is prescribed for the treatment of diarrhoea caused by microorganisms Entamoeba histolytica and Giardia lamblia. Additionally, it also treats vaginal and other bacterial infections. It slows down the growth or sometimes kills the harmful bacteria and parasites (amoeba) that cause infections. It may cause side effects such as headache, vomiting, nausea, abdominal pain, diarrhea, vaginal itching, and vaginal yeast infection. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.